Tractor unit vehicle



FIG. 1 is a front view of a tractor unit vehicle showing our new design;

FIG. 2 is a top, front, and left side perspective view thereof;

FIG. 3 is a top and right side perspective view thereof;

FIG. 4 is a top and left side perspective view thereof; and,

FIG. 5 is a front perspective view thereof.

The broken lines shown in the views illustrate portions of the tractorunit vehicle that form no part of the claimed design.

CLAIM The ornamental design for a tractor unit vehicle, as shown anddescribed.